Carbon paper pack



Dec. 2, 1947. @[TBUCKLEWR 2,431,729 1 Filed Aug. 10, 1944 Patented Dec. 2, 1947 UNITED STATES PATENT OFFICE CARBON PAPER PACK Garfield T. Buckley, Jr., Chicago, Ill.

Application August 10, 1944, Serial No. 548,828

.6 Claims.

My invention relates to carbon paper packs.

One of the objects of my inventionis to provide a carbon paper pack which can be easily and quickly attached and detached with respect to the holder bar on the carriage.

A further object is to provide a carbon paper pack in which successive sheets of carbon may be easily and quickly unfolded and placed in feeding position with respect to the feed rollers of a type machine.

A further object of my invention is to provide a carbon paper pack in which the unusable area of each carbon sheet is uninked and is reduced to a minimum, thus saving both carbon paper and carbon ink.

Further objects and advantages of the invention will be apparent from the description and claims.

In the drawings, in which an embodiment of my invention is shown, a

Figure 1 is a vertical sectional View showing a portion of a manifold type machine in combination with my improved carbon packs;

Fig. 2 is a perspective view of the carbon paper pack;

Fig, 3 is a vertical sectional view showing portions of the carbon pack carrier; and v Fig. 4 is a sectional view of a carbon paper pack showing a different folding arrangement.

Referring to the drawings in detail, the construction shown comprises a manifold type machine comprisin the platen roller I, the type bars 2, the feed rollers 3, 4 and 5, and the slidable carriage 6 to which the carbon packs 1 are secured.

Each carbon paper pack, as shown in detail in Fig. 2, comprises a plurality of carbon sheets 8 having their rear edges bound together in any suitable manner, as by stitching them at 9 inside of a folder or binder Ill made of heavy paper,

this binder having a loop portion II which can he slipped over a transversely extending bar I2 on the slidable pack carrier 6. In the original folded pack, each sheet is folded in zigzag formation to provide an uneven number of layers, the uppermost pne of which has a free end edge 22 at the opposite end of the pack from that at which the bound end edge of the sheet is located. The rear layer I3, Fig. 2, which is attached to the binder I0, is not provided with a carbon coating. The forward layer I4, which is the first to be entered between the platen roller I and the feed roller 3, is provided with a coating I of carbon on its upper surface. A substantia1 portion I6 of the intermediate layer I! has a coating of 2 carbon applied to its upper surface, leaving, however, a substantial portion I8 of this intermediate sheet uncoated.

In use, the fanfold or multifold sheet I9 (Fig. 3) on which the typing is to be done is drawn forwardly so that its front end is in position to enter between the platen roller I and the feed roller 3. Carbon paper packs are inserted between the layers of the fanfold sheet. Before inserting the pack, the loop II on the binder Ii] is slipped over a transversely extending holder bar I2. When the carbon paper is slipped between the sheets of the fanfold paper, the holder bar, which is provided with suitably spaced holes, is slipped over the upper ends of one pair of the two pairs of the holder pins 20 on the slide 6, thus holding the bar firmly in transversely extending positions. The slidable carriage 6 is pushed to its rear position. It should be stated that in inserting these carbon packs, all of the sheets in the pack are to be in their completely folded position. The top sheet of carbon paper from each of the packs is unfolded and drawn out to the position shown in Fig. 2, so that the front end 22 of the top sheet will be just a trifle in the rear of the front ends of the fanfold sheet. The platen roller is then given a feeding movement as the front ends of the fanfold sheet and of the unfolded carbon sheets are inserted between the platen roller and the feed roller 3. The platen roller is rotated until the desired portion of the fanfold sheet is opposite the printing position of the type face 2| on the type bar 2. The type machine is then operated until the first form on the fanfold sheet has been filled out.

The platen I is then raised away from the feed rollers 3, the projecting front edges of the fanfold sheet I9 are grasped to hold the fanfold sheet against rearward movement, and the sliding pack carrying carriage, which has been drawn to its forward position by the platen I and feed rollers, is pushed rearwardly, carrying with it all of the carbon packs I secured to the transversely extending bars I2. This brings the front edges 22 of the unfolded sheets of carbon paper back to a position in which these front edges are substantially opposite the printing position to be made. The platen roller is returned to its operative position and the forms which have already been typed are torn oif by means of a tearing blade or by the provision of weakened lines in the fanfold material. The operator is then ready to type a succeeding form on the fanfold material.

It will be noted that in this rearward movement of the pack holding carriage, the lowermost layer of the lowermost sheet of carbon paper of each pack slides over the immediately underlying ply of the fanfold sheet in a direction which will not cause the carbon sheets to be rumpled up or unfolded by frictional engagement and that the uppermost unfolded sheet of carbon paper of each pack, which rubs against the immediately overlying ply of the fanfold sheet, protects the folded carbon sheets lying underneath it from being rumpled up or unfolded by said overlying ply of the fanf old sheet.

The distance to which the unfolded sheet of carbon paper can be fed forwardly by the platen roller and feed roller is limited by the folded edges 23 of the superposed folded portions of the carbon sheets 8 which are collectively too thick to enter between the platen roller I and the feed. roller 3. Accordingly, the carbon is applied only to those portions and 16 of the sheet which is unfolded and which may pass beneath the type face. From this it follows that the distance from the rear edge of the carbon coating to the rear fold 22 in the carbon sheet is substantially equal to the distance circumferentially of the platen roller I between the point of entry between the platen roller l and the feed roller 3 and the point of application of the type face 2 I,

The construction of Fig. 4 is substantially the same as that in Figs. 1, 2, and 3, except that the carbon sheets 8, instead of being separately folded into zigzag formation, are folded as a complete unit into zigzag formation. In using this form the sheet of each pack which has its uppermost layer or ply exposed is first drawn out and placed in operative position and the type machine is then operated as described in connection with Figs. 1, 2, and 3. When this sheet is used up it is torn off" and the next succeeding sheet of each pack is drawn out for use.

Further modifications will be apparent to those skilled in the art and it is desired, therefore, that the invention be limited only by the scope of the appended claims.

Having thus described my invention, what I claim and desire to secure by Letters Patent is:

l. A carbon paper pack for use with a manifold type machine, which machine has aplaten roller, type bars and feed rollers cooperating with the platen roller, and a slidable carriage carrying a cross bar with respect to which the carbon paper packs are readily attachable and detachable, said pack comprising a plurality of sheets having their rear edges bound together and provided with means for ready attachment and detachment with respect to the cross bar so that said rear edges are closely adjacent said cross bar when the pack is attached thereto, each being folded back and forth to provide an uneven number of layers of substantially equal length whereby as a result of the uneven number of layers the free front edge of the sheet is exposed and easily accessible to the operator to enable the sheet to be pulled out from folded position to position of use, the front layer when unfolded being feedable by said rollers into typing position, the rear layer and the folded packs extending from a position adjacent said cross bar to a position adjacent said rollers when the carriage is in extreme forward position, the front layer being coated with carbon and the rear layer being uncoated, and a substantial rear portion of the penultimate layer being uncoated.

2. A carbon paper pack for use With a'manifold type machine, which machine has a platen roller,

type bars and feed rollers cooperating with the platen roller, and a slidable carriage carrying a cross bar with respect to which the carbon paper packs are readily attachable and detachable, said pack comprising a plurality of sheets having their rear edges bound together and provided with means for ready attachment and detachment With respect to the cross bar so that said rear edges are closely adjacent said cross bar when the pack is attached thereto, each being folded back and forth to provide an uneven number of layers of substantially equal length whereby as a result of the uneven number of layers the free front edge of the sheet is exposed and easily accessible to the operator to enable the sheet to be pulled out from folded position to position of use, the front layer when unfolded being feedable by said rollers into typing position, the rear layer and the folded packs extending from a position adjacent said cross bar to a position adjacent said rollers when the carriage is in extreme forward position, the front layer being coated with carbon and the rear layer being uncoated, a substantial rear portion of the penultimate layer being uncoated, and a substantial front portion of the penultimate layer being coated.

3. A carbon paper pack for use with a manifold type machine, which machine has a platen roller, type bars and feed rollers cooperating with the platen roller, and a slidable carriage carrying a cross bar with respect to which the carbon paper packs are readily attachable and detachable, said pack comprising a plurality of sheets having their rear edges bound together and provided with means for ready attachment and detachment with respect to the cross bar so that said rear edges are closely adjacent said cross bar when the pack is attached thereto, each being folded back and forth to provide an uneven number of juxtaposed layers of substantially equal length whereby as a result of the uneven number of layers the free front edge of the sheet is exposed and easily accessible to the operator to enable the sheet to be pulled out from folded position to position of use, the front layer when unfolded being feedable by said rollers into typing position, the rear layer and the folded packs extending from a position adjacent said cross :bar to a position adjacent said rollers when the carriage is in extreme forward position, the front layer being coated with carbon and the rear layer being uncoated, and a substantial rear portion .of the penultimate layer being :uncoated.

4. A carbon paper pack for use with a manifold type machine, which machine has a platen roller, type bars and feed rollers cooperating with the platen roller, and a slidable carriage carrying a cross bar with respect to which the carbon paper packs are readily attachable and detachable, said pack comprising a plurality of sheets having their rear edges bound together and provided with means for ready attachment and detachment with respect to the cross bar so thatsaid rear edges are closely adjacent said cross bar when the pack is attached thereto, each being folded back and forth to provide an uneven number of layers of substantially equal length whereby as a result of the uneven number of layers the free front edge of the sheet is exposed and easily accessible to the operator to enable the sheet to be pulled out from folded position to position of use, the front layer when unfolded being feedable by said rollers into typing position, the rear layer and the folded packs extending from a position adjacent said cross bar to a position adjacent said rollers when the carriage is in extreme forward position, the front layer being coated with carbon and the rear layer being uncoated, and a substantial rear portion of the penultimate layer being uncoated, said sheets being folded as a complete composite unit in zigzag formation.

5. A carbon paper pack for use with a manifold type machine, which machine has a platen roller, type bars and feed rollers cooperating with the platen roller, and a slidable carriage carrying a cross bar with respect to which the carbon paper packs are readily attachable and detachable, said pack comprising a plurality of sheets having their rear edges bound together and provided with means for ready attachment and detachment with respect to the cross bar so that said rear edges are closely adjacent said cross bar when the pack is attached thereto, each being folded back and forth to provide an uneven number of layers of substantially equal length whereby as a result of the uneven number of layers the free front edge of the sheet is exposed and easily accessible to the operator to enable the sheet to be pulled out from folded position to position of use, the front layer when unfolded being feedable by said rollers into typing position, the rear layer and the folded packs extending from a position adjacent said cross bar to a position adjacent said rollers when the carriage is in extreme forward position, the front layer being coated with carbon and the rear layer being uncoated, a substantial portion of the penultimate layer being uncoated, and a substantial rear portion of the penultimate layer being coated, said sheets being folded as a complete composite unit in zigzag formation.

6. A carbon paper pack for use with a manifold type machine, which machine has a platen roller, type bars and feed rollers co-operating with the platen roller, and a slidable carriage carrying a cross bar with respect to which the carbon paper packs are readily attachable and detachable, said pack comprising a plurality of sheets having their rear edges bound together and provided with means for ready attachment and detachment with respect to the cross bar so that said rear edges are closely adjacent said cross bar when the pack is attached thereto, each being folded back and forth to provide an uneven number of layers of substantially equal length whereby as a result of the uneven number of layers the free front edge of the sheet is exposed and easily accessible to the operator to enable the sheet to be pulled out from folded position to position of use, the front layer when unfolded being feedable by said rollers into typing position, the rear layer and the folded packs extending from a position adjacent said cross bar to a position adjacent said rollers when the carriage is in extreme forward position, the front layer being coated with carbon and the rear layer being uncoated.

GARFIELD T. BUCKLEY, JR.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 2,343,796 Petit Mar. '7, 1944 2,292,343 McAlvin Aug. 4, 194:2

939,150 Maxwell Nov. 2, 1909 1,133,331 Smith Mar. 30, 1915 Certificate or Correction Patent No. 2,431,729. December 2, 1947.

GARFIELD T. BUCKLEY, JR.

. It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Column 2, line 47, after the word position insert of the type faces 21, ready for the next impression; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the casein the Patent Ofiice.

Signed and sealed this 17th day of February, A. D. 1948.

THOMAS F. MURPHY,

Assistant Gammissioner of Patenta. 

